Shimano Ultegra Di2 Wire -- Long

Slimmer, and featuring smaller connectors than their Dura-Ace Di2 counterparts, these waterproof, plug-and-play cables for the Shimano Ultegra Di2 digital electronic shifting system tie all of the Di2 components together for the easiest, most precise shifting you've ever experienced. The Ultegra Di2 system requires five wire kits--junction box to front derailleur, junction box to rear derailleur, junction box to battery, junction box to front wiring kit and front wiring kit. Choose from 9 available lengths to fit your frame. See Item #50-8599 and Item #50-8600 for additional sizes. Wires can be run internally or externally.